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88 lines
2.2 KiB
88 lines
2.2 KiB
namespace com.hitrust.util.Encryption
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{
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using System;
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using System.Security.Cryptography;
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public sealed class PkzipClassicManaged : PkzipClassic
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{
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private byte[] key_;
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public override ICryptoTransform CreateDecryptor(byte[] rgbKey, byte[] rgbIV)
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{
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this.key_ = rgbKey;
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return new PkzipClassicDecryptCryptoTransform(this.Key);
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}
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public override ICryptoTransform CreateEncryptor(byte[] rgbKey, byte[] rgbIV)
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{
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this.key_ = rgbKey;
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return new PkzipClassicEncryptCryptoTransform(this.Key);
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}
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public override void GenerateIV()
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{
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}
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public override void GenerateKey()
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{
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this.key_ = new byte[12];
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new Random().NextBytes(this.key_);
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}
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public override int BlockSize
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{
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get
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{
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return 8;
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}
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set
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{
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if (value != 8)
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{
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throw new CryptographicException("Block size is invalid");
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}
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}
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}
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public override byte[] Key
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{
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get
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{
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if (this.key_ == null)
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{
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this.GenerateKey();
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}
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return (byte[]) this.key_.Clone();
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}
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set
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{
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if (value == null)
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{
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throw new ArgumentNullException("value");
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}
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if (value.Length != 12)
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{
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throw new CryptographicException("Key size is illegal");
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}
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this.key_ = (byte[]) value.Clone();
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}
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}
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public override KeySizes[] LegalBlockSizes
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{
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get
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{
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return new KeySizes[] { new KeySizes(8, 8, 0) };
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}
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}
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public override KeySizes[] LegalKeySizes
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{
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get
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{
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return new KeySizes[] { new KeySizes(0x60, 0x60, 0) };
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}
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}
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}
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}
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